第一种是for循环

def sumStartToEnd(start,end):
    sum = 0
    for n in range(start,end+1,1):
        sum = sum + n
    return sum
    
#if __name__ == '__main__' :
print(sumStartToEnd(1,10000))

def sum():
    sum = 0
    for n in range(1,101):
        sum = sum + n
    return sum
 
print(sum())

第二种是while循环

def sum():
    sum = 0
    x=1
    while x < 101:
        sum = sum + x
        x+=1
    return sum
print(sum())

第三种，导入模块的内建函数reduce

def sum(x, y):
    return x + y
from functools import reduce
print(reduce(sum, range(1,101)))